Basically I just figured out what I needed to know for the bare minimum to run a game
Then my friends and I discussed it and that I was really new at it so things might be rough, and the DM screen is basically a quick reference guide for things you’ll need to know
That was back in the days of DnD 3.5
With the new group I’ve got we decided to do 5e (which I had never ran before) so I picked up a starter set and ran it from there, which was really easy to do
A few quick tips for you: don’t be afraid to improvise, don’t be afraid to ask for a moment to look something up, don’t worry about doing different voices for everyone you roleplay as it ain’t necessary, and most of all have fun
Basically the biggest hurdle for DMing was getting past my nerves to actually commit to a date